• Ujjal Kalita
• Dr. Manpreet Singh

Over a few decades it is observed that the number of vehicles has increased because of which the level of noise emitted by vehicles is getting worse. Exhaust noise is preferred to be highest than the other structural noise. So, acoustic filters are used for reducing this noise coming from the exhaust system. Simple expansion chamber muffler is one such filters. Transmission loss is the main performance parameter for evaluating the noise reduced by this muffler. In this study a new design of muffler is proposed by optimization, where length and diameter of chamber are considered as the main parameter for optimization. This design is created in CAD software and the acoustic analysis for the muffler is performed through simulation method in ANSYS software. The results obtained from analysis are compared with the work performed by two other authors. From this it is found that the optimized single expansion chamber muffler gives us better acoustic performance value.

"PREDICTION OF TRANSMISSION LOSS ON A SIMPLE EXPANSION CHAMBER MUFFLER", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.5, Issue 12, page no.1022-1031, December 2018, Available :http://www.jetir.org/papers/JETIRDZ06133.pdf

"PREDICTION OF TRANSMISSION LOSS ON A SIMPLE EXPANSION CHAMBER MUFFLER", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.5, Issue 12, page no. pp1022-1031, December 2018, Available at : http://www.jetir.org/papers/JETIRDZ06133.pdf